doscopic variceal ligation. The Stieg− mann±Goff ligator works by pulling a string to deploy the band [1], but requires an overtube for multiple ligations. Saeed’s multishooter has the advantage of single insertion, pulling a single band at a time and is able to shoot six bands [2]. Most multishooters use a double thread, however, which hampers the en− doscopic view. Our single−thread system ha...

Thread pooling is a common programming idiom in which fixed set of worker threads are maintained to execute tasks concurrently. The workers repeatedly pick and them completion. Each task sequential, with possibly recursive code, communicate over shared memory. Executing can lead more new being spawned. We consider the safety verification problem for thread-pooled programs. parameterize two para...

In modern processors, the DRAM system is shared among concurrently-executing threads. Memory requests from a thread can delay requests from other threads by causing bank/bus/rowbuffer conflicts. Conventional DRAM controllers are unaware of inter-thread interference, which causes two problems. First, some threads are unfairly penalized and denied DRAM service for long time periods. Second, as we...

Technical nanofibre production is linked to high voltage, because nanofibres are typically produced by electrospinning. In contrast, spiders have evolved a way to produce nanofibres without high voltage. These spiders are called cribellate spiders and produce nanofibres within their capture thread production. It is suggested that their nanofibres become frictionally charged when brushed over a ...

Cribellar thread is the most primitive type of sticky prey capture thread found in aerial spider webs. Its outer surface is formed of thousands of fine fibrils that issue from a cribellum spinning field. The fibrils of primitive cribellar thread are cylindrical, whereas those of derived threads have nodes. Cribellar threads snag on insect setae but also adhere to smooth surfaces. A previous stu...

To realize the performance potential of multicore systems, we must effectively manage the interactions between memory reference behaviour and the operating system policies for thread scheduling and migration decisions. We observe that these interactions lead to significant variations in the performance of a given application, from one execution to the next, even when the program input remains u...

Today, mobility and persistence are important aspects of distributed applications. They have many fields of use such as load balancing, fault tolerance and dynamic reconfiguration of applications. In this context, the Java virtual machine provides many useful services such as dynamic class loading and object serialization which allow Java code and objects to be mobile or persistent. However, Ja...

This document describes a portable light-weight thread runtime system for uniand multiprocessors targeted at irregular applications. Unlike most other thread packages, which utilize hard-coded scheduling policies, Active Threads provides a general mechanism for building data structure specific thread schedulers and for composing multiple scheduling policies within a single application. This all...